How can you automatically generate a malicious .bgi file using PowerShell?

You can write a PowerShell script that reads the fixed header (0x00000000 to 0x00000300) from a known `.bgi` template, encodes it as Base64, then decodes and writes it to a new file. Using `[System.IO.File]::WriteAllBytes()` and `[System.IO.FileStream]`, you append the flag byte (calculated as `path_length + 2`) and the VBS script path, then overwrite trailing `0D0A` bytes with nulls. This automation removes the need for manual GUI steps. The article [Study Notes of using BGInfo to bypass Application Whitelisting](/news/study-notes-of-using-bginfo-to-bypass-application-whitelisting) provides the complete PowerShell code for this process.